Hi @somedguser

If you want to run your own mail server, you can, but unless you have a lot of time or experience with that, then I wouldn’t recommend it.

There are many mail providers, only a few is free when you want to use your own domain, but the services they provide is worth the money (spam, virus, backup, security, etc).
If you just want to be able to send mail, then you can use https://www.sparkpost.com and if you’re using WordPress for your website, then there’s a plugin for easy setup too https://wordpress.org/plugins/sparkpost/